Added hamming.c and updated the corresponding README.md (#39)

Day3/C/hamming.c

@@ -0,0 +1,36 @@
+/**
+ * @author: Rajdeep Roy Chowdhury<rrajdeeproychowdhury@gmail.com>
+ * @github: https://github.com/razdeep
+ * @date: 24/12/2018
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+int hammingDistance(const char *first_word, const char *second_word)
+{
+    int count = 0;
+    if (strlen(first_word) != strlen(second_word))
+    {
+        return -1;
+    }
+    for (int i = 0; i < strlen(first_word); i++)
+    {
+        if (first_word[i] != second_word[i])
+        {
+            count++;
+        }
+    }
+    return count;
+}
+
+int main()
+{
+    char first_word[100], second_word[100];
+    printf("Enter the first word: ");
+    scanf("%s", first_word);
+    printf("Enter the second word: ");
+    scanf("%s", second_word);
+    printf("The hamming distance between %s and %s is: %d\n", first_word, second_word, hammingDistance(first_word, second_word));
+    return 0;
+}

Day3/README.md

@@ -132,6 +132,49 @@ public class HammingDistance {
      return 0;
  }
 ```
+
+## C Implementation
+
+### [hamming.c](./C/hamming.c)
+
+```c
+/**
+ * @author: Rajdeep Roy Chowdhury<rrajdeeproychowdhury@gmail.com>
+ * @github: https://github.com/razdeep
+ * @date: 24/12/2018
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+int hammingDistance(const char *first_word, const char *second_word)
+{
+    int count = 0;
+    if (strlen(first_word) != strlen(second_word))
+    {
+        return -1;
+    }
+    for (int i = 0; i < strlen(first_word); i++)
+    {
+        if (first_word[i] != second_word[i])
+        {
+            count++;
+        }
+    }
+    return count;
+}
+
+int main()
+{
+    char first_word[100], second_word[100];
+    printf("Enter the first word: ");
+    scanf("%s", first_word);
+    printf("Enter the second word: ");
+    scanf("%s", second_word);
+    printf("The hamming distance between %s and %s is: %d\n", first_word, second_word, hammingDistance(first_word, second_word));
+    return 0;
+}
+```
 ## Why Hamming Distance?
 
 The #1 reason for not being successful is inconsistency, and it is a common trend that people start something and on give up on the third day itself, and one of the major reasons behind that is that they find it difficult to continue.